7 RSAUM Load thread...Post your 7RSAUM(ony 7RSAUM) Load

[JLDavid]

I may try H4350 in it to see if I can find a more efficient load to get around the 3000fps node with accuracy. Will be sure and post my findings. Love this thread.

 

[Quickoz]

Im running H4350 and 180Hybrids. But run on the low end of speed. I find its quite accurate. Plus I dont worry as much about case or barrel life. I havent run H4831SC or H1000 yet. Probably wont as its very hard to find here in Aus.

 

[No i deer]

I don't have a saum , but i do know that the UK shooters are getting on very well with VV165 and are getting the speeds you are looking for ,PM GLC on this forum i know he has a 7saum and has just Won the GB F Class league .
Also the second place shooter in the GB league uses a 7mm saum and also uses VV165.

I shoot the GB f class league matches..
I use a 7mm saum 1 in 8.25t with 184gr hybrids and 61.4grs of Vith N165 gave me 2940fps when I developed the load.. I've not checked it for 650 shots and I think the barrel has sped up somewhat..
Actual elevations suggests it's doing about 3000fps but I don't know for sure...
Still getting great accuracy so I've not bothered to check it.

 

[No i deer]

My first saum barrel was a 1 in 9 and shot the 180s and 184s really well but on H1000.
180gr hybrids 63.8grs for 2975fps.
184gr hybrids 63.6grs for 2960fps.

 

[tom]

Bumping up to ask if anyone is having luck with rl23? Gonna do a improved version for a hunting gun and have a pile of rl 23. Plan on using 175 ablr since I've seen good precision and terminal performance from several friends.


Tom

 

[Terry]

Where are the RL26 loads?

 

[taylorw]

Bumping up to ask if anyone is having luck with rl23? Gonna do a improved version for a hunting gun and have a pile of rl 23. Plan on using 175 ablr since I've seen good precision and terminal performance from several friends.


Tom

It is one of the more consistent powders in my 7saum. My load is 58.3 in Norma brass, BR2’s, 180 vlds running 2930, 26” barrel. It pressured out (bolt lift) at 59.6. It runs the h1000 velocity node and was about the same in accuracy but is more temp stable in my barrel.

 

[Longrange57]

It is one of the more consistent powders in my 7saum. My load is 58.3 in Norma brass, BR2’s, 180 vlds running 2930, 26” barrel. It pressured out (bolt lift) at 59.6. It runs the h1000 velocity node and was about the same in accuracy but is more temp stable in my barrel.

I'm currently running 30 inch barrel at 2930 with same load of H4831sc and 180 vld's. Very accurate. 58.3 gr and CCI200 primer. Also shoots well with H1000 and S/B primer. Was not as consistent with RL 23 or 26. That does not mean it will not work for others and their combination.

 

[davidjoe]

Where are the RL26 loads?

I’ve looked at it with 183 SMK’s a little because I have had them, so I need to use them, and have wanted to see if I could basically iron out occasional flyers I’ve seen, by shooting them fast. Because slow and moderate have been so so. 26 has shot many X’s in limited testing and crossed the 600 yard target at 2,400+ at 63.0 grains, making that powder and bullet combination the fastest saum load at midrange I’ve shot. Did it solve flyers, I don’t know yet and presently am a primer miser, but certainly it’s no less accurate and carries a real wind advantage.

 

[J.d. Popkes]

Rl26 maxes out at 66.5 gr with the 184 in my rifle. 3150 avg, Sd/3. But didn’t really group well and I got off it. Shot decent around 65gr, but not crazy good. 28” 8.7 tw bartlein.

I’m gonna go back to a faster powder and hopefully find something quick rather than use my entire bbl on load development.

210m, RP CASES, throated to where I’m above the neck/shoulder at touch.

 

[taylorw]

Where are the RL26 loads?

This is out of the same 26” barrel as mentioned in the above post for RL23. It prefers BR2’s, followed by CCI250’s with the 3 powders tested previously, so went straight to those & shot both side by side at 670 yds. The BR2’s worked out better in my barrel but you may see different results with something else in yours. RL 26 held an ideal shaped ladder and the tune/node was 61.4-62.2. I hit bolt lift at 63.4 but I’m running Norma brass and don’t think this barrels chamber was finished with enough surface so pressures out a little early. I settled on 61.6 at 3015fps, 180 VLD’s. Very accurate load... it did shoot a touch smaller than RL23 & H1000 for me. Since this is a hunting rifle, I only experimented with the temp stability from 28-62 degrees. It avg about 23 FPS velocity change over those temp swings with a consistent ES of ~13 throughout. Seems to be fairly predictable But haven’t tested it above 62 so may be different in hot weather.

 

[bobinpa]

A lot of good info in this thread.... What twist are you guys running for the 180 class bullets?
I'm planning to do an improved version and I am thinking about using an 8.5 twist.
Give me your opinions.

 

[mac86951]

hornady 162bthp match with imr 4831 58.3gr and fed 215M. Seated to 2.790

2950s measure, yes it's a bit temperature sensitive; tested this one in the heat of SW.

 

[taylorw]

A lot of good info in this thread.... What twist are you guys running for the 180 class bullets?
I'm planning to do an improved version and I am thinking about using an 8.5 twist.
Give me your opinions.

I think 8.5 is a good middle ground for 180’s and you can still shoot 168’s with no issues. Both of my barrels have been 1:8 and I will do an 8.5 for the next one.
What will you be using the rifle for? If it’s for competition and your only planning to run 180’s, may be better to go 1:9.

 

[BowWow]

Any of you guys have a cartridge length with 180 grain or about bullets that works for ya?

My barrel was chambered with a long throat, so I can't get the ogive close to the lands.

 

[Archer79]

I've looked for a thread on here that post 7 RSAUM loads only, and haven't found one, so lets start on here. Just got my chambered up and a little surprise at the velocities that I'm getting so, I needed some comparsions...

So far...

Bat with 31" Bartlein 1:87-1:93 twist, Remington Brass, Fed 210M's, .3195 neck with .200 freebore, Beger 180 Hybrids jumping .015, OAL 3.110...Temp 65F Barrel has 55 rounds through it..

VV560 - 61.0 - 2870fps
VV560 - 62.0 - 2955 fps
H4831SC - 61.0 - 2901 fps
H4350 - 56.0 - 2875fps

The VV560 groups were not good at all, while the H4350 fired a .741 actual size group at 300 yards(5-shots)....

I was expecting velocities quite a bit faster based on what everyone is saying...Several places in these forums were it's spoken about Biggs getting 2950-3000 with 56 grs of 4350...

Please post your loads...

What chronograph are you using if I can ask

 

[Archer79]

Bumping up to ask if anyone is having luck with rl23? Gonna do a improved version for a hunting gun and have a pile of rl 23. Plan on using 175 ablr since I've seen good precision and terminal performance from several friends.


Tom

Mine will shoot with 16 or 23 mine Is a straight saum...but my loads are way lighter than any I've seen listed...I'm running adg brass in a 30" 8.5 twist Broughton....I try to keep it 2950 or under with 180s....it shot a 4.5" the last shoot of the year at wmspt and honestly with the right person behind the gun it might do even better

 

[bobinpa]

I think 8.5 is a good middle ground for 180’s and you can still shoot 168’s with no issues. Both of my barrels have been 1:8 and I will do an 8.5 for the next one.
What will you be using the rifle for? If it’s for competition and your only planning to run 180’s, may be better to go 1:9.

This will be a heavy barrel for informal ground hog/score matches and ground hog hunting. Planning to run the 180 class bullets. Considering twist rates at the moment. Really not sure what to do there... A lot of guys on here have more experience than me and from what I've read, it seems like a coin toss between a 8.5 and a 9.

 

[jlaner0408]

There seems to be a ton of F class guys listing loads in here. Anybody have loads for a shorter (20-22” barrel) saum? Or has anyone ran loads with accurate magpro?

I’m wanting to use magpro (have a lot of it) and want to run it in a short barrel with 150 grain (plus/minus 10 grains) class bullets. There doesn’t seem to be a whole lot of people out there doing this. But I figured it’s worth a shot to ask.

 

[jaybigboy34]

Steve is right of course, you still have to get out and test the rifle, howerver, it will help you zero in on a good load faster.

Looks like my weekend is shot, turns out I'm not going hunting after all and I was hoping to shoot the practice match Saturday and then shoot Sunday again. Oh well, we need the rain, so let it rain!

Erik,
I know this post is from 2011 but just wondering if you still use the QL program or has it became obsolete and you use something else now? Thank you.